Why is the Matlab R2015a Coder not able to generate code from resample function - but Matlab 2016b Coder is?

Hi everybody, I try to generate C++ Code from my function but I cant use the resample function (it always ends with err "coder.const could not reduce this expression to a constant: Time out exceeded.") although I declare each input as a constant and i have licensed the USP System Toolbox ( license checkout signal_blocks == true). Also I ran the same code with the Matlab 2016b Coder and generated my C++ Code without any problem. So where is the difference? Best regards

My code looks like this:

 Q=1000000;
% P=floor(Resampling_Faktor*Q); % floor: rounds to the nearest integer
P = 500000; % for testing
Input=1:0.1:20; % for testing
Input = resample(Input,P,Q,5,20);

Answer 1

[Venkata Siva Krishna Madala]

Hello Daniel,

Try to increase Constant Folding Timeout value.This can be done in two ways:

1. At the command line, create a configuration object for code generation. Set the property ConstantFoldingTimeout to the value that you want, like 400000:

c = coder.confi;
c.ConstantFoldingTimeout = 4e5;

2. In the Project Settings dialog box, on the All Settings tab, set the field Constant folding timeout to the value that you want.

Regards,

Krishna Madala

Answer 2

[Daniel Burger]

Dear Krishna, thanks for your advice. So do you mean that the failing code generation doesnt depend on my MATLAB version but instead on the system? Since I used two differend machines with different performance to run both MATLAB versions i mentioned above and therefore on the slower machine the time ran out before code generation was successful?

Regards, Daniel